The Supervision of Sabo Dam Construction at Trising River TR-RRD2, Magelang Regency aims to ensure that construction complies with technical specifications, national regulations, and safety standards as part of an effort to control cold lava (lahar) flows from Mount Merapi. Uncontrolled lahar flows pose significant risks to farmland, residential areas, and infrastructure, making this project a crucial part of disaster mitigation strategies. Conducted by PT. Globetek Glory Konsultan in collaboration with KSO partners under the supervision of SNVT Pelaksanaan Jaringan Sumber Air Serayu-Opak, the project was carried out over 210 calendar days, from March 10, 2021, to October 6, 2021, funded by the State Budget (APBN) for the 2021 Fiscal Year.

The supervision scope includes quality verification of materials and construction methods, physical work monitoring, cost and schedule management, and design adjustments based on field conditions. The key infrastructure consists of the sabo dam, retaining walls, and evacuation routes, constructed using K175 concrete and stone masonry to withstand lahar flows. Additionally, the project involves the construction of access roads to the Sabo Dam, facilitating operational efficiency and long-term infrastructure maintenance. With a systematic and nationally standardized approach, this project strengthens water resource infrastructure resilience in Magelang Regency, enhances public safety, and serves as a strategic measure in managing Mount Merapi’s lahar flow disasters.